Keystones — Lintel
Five GCSE retrieval questions · 18 April 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00059
Answer: 5.9 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 34°. Find opposite
Answer: 10.cm -
4. Ratio Mixed ratio problems
£336.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £144.00 -
5. Statistics Mean
The mean of 6 numbers is 38. If 5 of them are 40, 46, 33, 31, 41, what is the missing number?
Answer: 37